This game is a little weird. First for some things I don't have any idea what they should represent. So maybe adding a name tag would be good.
Secondly, please add a way to restart the game without closing it. This is really annoying.
And a small tip. If you stick with pixel art, try to find a suitable pixel art font ;)
Anyhow, I managed to get Mercury, Mars and Pluto after around 15-20 tries out of the 720 possible combinations :D
I would apprecieate it if you rate my game too ;)